I gave the Component_Thumbnail_Wrapper a fixed height of 284px (to match the width) and moved the margin inside to be padding. Then I gave the parent ThumbnailGrid_Container a fixed height that is double the child so 568px.

The only unfortunate part is not being able to keep the padding between rows consistent. But, it’s a small compromise.

Yep, I wasn’t sure if that was an acceptable compromise for you. You’ll just need to play with the heights of the flex parent and child classes in order to adjust the vertical spacing. Also be aware that long titles that wrap down to a second line might look odd since the heights are not auto.